#include <stdio.h>

int main(int argc, char const *argv[])
{
    char a,b,c,d;

    a = 'F';        
    b = 'A' + 2;
    c = ' ' + 'B';
    d = 'b' - 32;

    printf("a=%d\n",a);
    printf("b=%d\n",b);
    printf("c=%d\n",c);
    printf("d=%d\n",d);


    return 0;
}
